The number of vascular bundles in neck-panicle was mainly controlled by genetic factors.
穗颈维管束数主要受遗传因素控制，环境条件的影响相对较小。
The weight of a single sheath is correlated with the number of large vascular bundle and the area of vascular bundles, is correlated significantly with the area of phloem for vascular bundles.
单茎鞘重与大维管数、维管总面积相关显著，与韧皮部总面积相关极显著。
The effects of the panicle length, branch distribution, number of spikelets, seed set percentage, neck vascular bundles and plant weight per stem on spikelet number per panicle were analyzed.
分析了穗长、枝梗分布、枝梗颖花数及其结实率、穗部维管束数目和开花期单茎干物重对穗粒数的影响。
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